declare const CustomEventConstructor: {
    new <T>(type: string, eventInitDict?: CustomEventInit<T>): CustomEvent<T>;
    prototype: CustomEvent;
};
declare function PatchedCustomEvent<T>(this: Event, type: string, eventInitDict: CustomEventInit<T>): CustomEvent<T>;
declare namespace PatchedCustomEvent {
    var prototype: CustomEvent<any>;
}
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